Subject: Date: Tue, 23 Jul 2002 13:54:23 -0400 (EDT) From: Glen Takahara To: dmd1@lehigh.edu Dear Dr. Davis, Sorry, I also meant to post a question: If U1,...,U5 are 5 distinct elements of SO(3), the proper symmetric group, then I am able to prove that U1 + ... + U5 = 0 is impossible. However, my proof is brute force and I would like to know if anyone has some intuition or high-level reason why they would expect this equality to be impossible. Sincerely, Glen Takahara Department of Mathematics and Statistics Queen's University Kingston, Ontario Canada, K7L 3N6 (613)533-2430 takahara@mast.queensu.ca